This image shows a 3D-printed heart stent, a tiny tube delivered by catheter to restore blood flow in a blocked coronary artery after a heart attack. Colorful micro-cubes decorate the stent and act like mini pill boxes, each programmed to release drugs at different times. Drug release rates can be controlled by changing the material of the cube, allowing one implant to deliver multiple medicines in sequence to support recovery and regeneration in a smarter, more personalized way.